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Every control module on the 1975-1979 Chevrolet Nova — where it lives, replacement time, and what it takes to program a replacement.
High Energy Ignition Module (HEI)0.5 hr R&Rno coding
📍 Integrated into distributor cap assembly under hood
⚠️ Non-programmable solid-state ignition trigger module. Standard equipment on all engines from 1975. Replace module only; distributor timing must be mechanically adjusted after installation.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1978 Chevrolet Nova 250ci I6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.